This project contains the following sections: 1. **INDIVIDUAL DATA** Individual (averaged) data corresponding to our paper "An extremely fast neural mechanism to detect emotional visual stimuli: A two experiment sutudy", PLoS ONE 19(6): e0299677. Please contact carretie(at)uam.es for individual raw data. A) **Experiment 1 data**. The file [data_Exp1.mat][1] is a Matlab matrix containing the across-trial averaged ERP data (once preprocessed as explained in the paper) for each participant (n=36), condition (n=10), and EEG channel (n=64). Epochs begin 99.61 milliseconds (ms) before stimulus onset and end 199.22 ms after. Since sampling rate was 512Hz, each epoch has 154 data points. Therefore, data_Exp1.mat size is **36x10x154x64** (in this order: participants, conditions, data points, EEG channels). The order of conditions is: SpidersUL, SpidersUR, SpidersFIX, SpidersLL, SpidersLR, WheelsUL, WheelsUR, WheelsFIX, WheelsLL, WheelsLR. Please see the paper for details on these conditions. The order of channels (all referenced to nosetip) is: Fp1 AF7 AF3 F1 F3 F5 F7 FT7 FC5 FC3 FC1 C1 C3 C5 T7 TP7 CP5 CP3 CP1 P1 P3 P5 P7 P9 PO7 PO3 O1 Iz Oz POz Pz CPz Fpz Fp2 AF8 AF4 AFz Fz F2 F4 F6 F8 FT8 FC6 FC4 FC2 FCz Cz C2 C4 C6 T8 TP8 CP6 CP4 CP2 P2 P4 P6 P8 P10 PO8 PO4 O2. B) **Experiment 2 data**. The file [data_Exp2.mat][2] is a Matlab matrix containing the across-trial averaged ERP data (once preprocessed as explained in the paper) for each participant (n=35), condition (n=2), and EEG channel (n=64). Epochs begin 99.61 ms before stimulus onset and end 201.17 ms after. Since sampling rate was 512Hz, each epoch has 155 data points. Therefore, data_Exp2.mat size is **35x2x155x64** (in this order: participants, conditions, data points, EEG channels). The order of channels (all referenced to nosetip) was identical to that of Experiment 1. 2. **SUPPLEMENTAL MATERIAL** Supplemental material mentioned in our paper "An extremely fast neural mechanism to detect emotional visual stimuli: A two experiment sutudy", PLoS ONE 19(6): e0299677: - [Electrode array][3] in both experiments. - Grand averages representing the whole epoch (-100 to 150 ms). *>[Experiment 1][4]* *>[Experiment 2][5]* - [Source estimation solutions for P80 (Experiment 1) in response to peripheral stimuli][6]. - [Traditional analyses][7] (i.e., on direct voltages from a set of relevant electrodes) on N40-P80 (Exp. 1) and N40-P100 (Exp. 2) peak-to-peak amplitudes. - Parallel data, preprocessing and analysis of Experiment 1 recordings using a longer epoch showing the effect of peripheral stimuli on late ERP activity (LPP). To avoid the sustained low-frequency noise usually affecting longer epochs, **high-pass** filtering was set to **0.3 Hz**. *>[Individual data][8]* (data_Exp1_HPfilter0p3.mat: data matrix size is 36x10x**404**x64 since epoch in this case is -200 to 588 ms). *>[Analyses and results of LPP to peripheral stimuli][9]* ---------- **Note:** An alternative analyses of Experiment 1 was initially carried out on the data preprocessed through a 0.3 Hz high-pass filter (see section 2 above). Please visit the complement "[Alternative Experiment 1 results (high pass filter at 0.3Hz)][10]" to access those alternative results and their description through a preliminary preprint. [1]: https://osf.io/9bc2y/files/osfstorage [2]: https://osf.io/9bc2y/files/osfstorage [3]: https://osf.io/wxzhs [4]: https://osf.io/nywtu [5]: https://osf.io/429mn [6]: https://osf.io/qfc9y [7]: https://osf.io/gr2w3 [8]: https://osf.io/85tzs [9]: https://osf.io/7mjg4 [10]: https://osf.io/64y32/wiki/home/